5G Radio Access Technology Kumar Balachandran Principal Research - - PowerPoint PPT Presentation

5G Radio Access Technology

Kumar Balachandran

Principal Research Engineer Ericsson Research

5G Radio Access | Public | IEEE 5G Summit Seattle | 2016-11-05 | Page 2

• Very high traffic capacity
• High data rates everywhere
• Very low latency
• Ultra-high reliability and availability
• Massive number of devices
• Very low device cost and energy

consumption

• Very high network energy performance
• ...

5G Wireless Access

More than just enhanced mobile broadband

Connectivity anywhere and anytime for anyone and anything

Flexibility for new applications and usage cases A wide range of requirements and capabilities

5G Radio Access | Public | IEEE 5G Summit, Seattle| 2016-11-05 | Page 2

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5G Radio Access

NR

Tight interworking

Evolution of LTE

Evolution of existing technology + New radio-access technology

5G Radio Access | Public | IEEE 5G Summit, Seattle| 2016-11-05 | Page 3

1

Latency reductions

LAA

Multi-antenna enhancements

Enhanced MTC V2X

5G Radio Access | Public | IEEE 5G Summit Seattle | 2016-11-05 | Page 4

Proposals Rel-14

NR – 3GPP timeplan

2013 2014 2015 2016 2017 2018 2019 2020 2021 Rel-13 Rel-15 Rel-16

5G SI(s)

Rel-17

Requirements Specifications

Vision, feasibility Requirements Specs

NR Phase1 NR Phase2

Acceleration

5G Radio Access | Public | IEEE 5G Summit Seattle | 2016-11-05 | Page 5

NR – Key technology features

Access/backhaul integration Direct device-to-device connectivity Massive antenna configurations

Ultra-lean design Extension to higher frequency bands

Multi-site connectivity/coordination OFDM-based physical layer

Minimize network transmissions not directly related to user data delivery

1 GHz 3 GHz 10 GHz 30 GHz 100 GHz

4G 5G

5G Radio Access | Public | IEEE 5G Summit, Seattle| 2016-11-05 | Page 5

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› Lower frequencies: Mainly FDD

– Co-existence with existing deployments – Avoid TDD-specific interference

› Higher frequencies: Mainly TDD

– Easier to find unpaired spectrum supporting very wide transmission bandwidth – Higher degree of channel reciprocity  Additional beam-forming possibilities – Enabling dynamic assignment of downlink/uplink resources

Duplex arrangement

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› Lower frequencies:

– Similar antenna configurations as LTE – Bandwidth limited  Spatial multiplexing (data rates) and multi-user MIMO (capacity) more important – Evolution/refinement of LTE multi-antenna transmission

› Higher frequencies:

– Very large number of controllable antenna elements – Typically plenty of bandwidth  Beam-forming for coverage more important – Need coverage for all transmissions, including control, system information, random access, …. – Mobility between beams rather than between cells – Also beam-forming at the device side

Multi-antenna transmission

NR

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Radio Network Evaluations

5G Radio Access | Public | IEEE 5G Summit Seattle | 2016-11-05 | Page 9

Assumptions

LTE

– 20MHz FDD – 4x4 MIMO  Peak rate ~400 Mbps

NR

– 200MHz TDD at 28GHz – 2x4 SU-MIMO, 90% DL  Peak rate ~1.4 Gbps – Total of 32 BS antennas

› LTE and NR using the same sites › Over-the-roof-top deployment

– ISD = 235 m or ISD = 127 m

› Only outdoor users

5G Radio Access | Public | IEEE 5G Summit Seattle | 2016-11-05 | Page 10

Downlink peak Throughput

Limited throughput in some

• utdoor areas

Close to peak throughput in most outdoor areas

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Gains from interworking

Interworking improves achievable throughput

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› NR offers a new air interface for 5G operation in all IMT bands

– New frame structure – Better support for large antenna arrays than LTE – Lean design with self-contained frame

› System evaluations highlight the need for new spectrum

– Denser networks are needed for good standalone operation – Operation at higher bands (e.g. at 28 GHz ) benefits from coverage in lower bands (<6 GHz) – Good quality of experience will need wider system bandwidth for coverage bands

Summary